Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores.
S 1390 (OTTO) Silica gel 400-700 mesh Cas 112926-00-8 - used as catalyst carriers, adsorbents, separators and variable-pressure adsorbent.